Michel, Julien; Mateu-Vicens, G; Westphal, Hildegard (2010): Radiocarbon measurements and loose-sediment quantification of seafloor sediment samples off northern Mauritania. PANGAEA, https://doi.org/10.1594/PANGAEA.753003, Supplement to: Michel, J et al. (2011): Modern heterozoan carbonates from a eutrophic tropical shelf (Mauritania). Journal of Sedimentary Research, 81(9-10), 641–655, https://doi.org/10.2110/jsr.2011.53
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Heterozoan carbonates are typical for extratropical sedimentary systems. However, under mesotrophic to eutrophic conditions, heterozoan carbonates also form in tropical settings. Nevertheless, such heterozoan tropical sedimentary systems are rare in the modern world and therefore are only poorly understood to date. Here a carbonate depositional system is presented where nutrient-rich upwelling waters push onto a wide shelf. These waters warm up in the shelf, giving rise to the production and deposition of tropical heterozoan facies. The carbonate facies on this shelf are characterized by a mixture of tropical and cosmopolitan biogenic sedimentary grains. Study of facies and taxonomy are the key for identifying and characterizing tropical heterozoan carbonates and for distinguishing them from their coolwater counterparts, in particular in the past where the oceanography cannot be determined directly.
Median Latitude: 20.432392 * Median Longitude: -17.305220 * South-bound Latitude: 19.724780 * West-bound Longitude: -17.683430 * North-bound Latitude: 20.815070 * East-bound Longitude: -16.953350
Date/Time Start: 2006-12-30T21:43:00 * Date/Time End: 2008-05-12T14:26:00
GeoB11501-1 (POS346_01) * Latitude: 19.750000 * Longitude: -17.499830 * Date/Time: 2006-12-30T21:43:00 * Elevation: -1550.0 m * Location: off Mauritania * Campaign: POS346 (POS-346) * Basis: Poseidon * Method/Device: CTD/Rosette (CTD-RO)
GeoB11511B (POS346_11B) * Latitude: 19.842330 * Longitude: -17.199300 * Date/Time: 2007-01-01T19:10:00 * Elevation: -24.2 m * Location: off Mauritania * Campaign: POS346 (POS-346) * Basis: Poseidon * Method/Device: van Veen Grab (VGRAB)
Datasets listed in this publication series
- Michel, J; Mateu Vicens, G; Westphal, H (2010): (Table 2) Loose-sediment quantification of seafloor sediment samples as percentages and normalized percentages of the identified bioclasts. https://doi.org/10.1594/PANGAEA.752200
- Michel, J; Mateu Vicens, G; Westphal, H (2010): Radiocarbon measurements and age calibration of eroded mollusc shells from seafloor sediment samples. https://doi.org/10.1594/PANGAEA.752212